Sleep-aid-pills are effective in helping you to gain peaceful sleep at night and sleeping pill such as Ambien has obtained approval from the Food and Drugs Administration (FDA) which further authenticates it efficacy. Ambien is a popular sleep aid and it functions by unleashing effects on the central nervous system of the brain. As soon as this sleeping pill is administered, it starts affecting the central nervous system and decreases the activity of the brain. With the reduction of brain activity, your anxiety is lowered and this in turn helps you to enjoy peaceful sleep throughout the night.